add pwm timer. It operates on arndale board. Test code in tests_gic_timer.c
add pwm timer It operates on arndale board. Test code in tests_gic_timer.c
remove garbage comment
modify test_gic_timer.c for pwm
Add pwm timer test function in tests.c and disable by macro definition.
remove blank line
remove changed history
adjust indent
Merge pull request #34 from in1004kyu/inkyu-v1

Add pwm timer.